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Jefferson City, Illinois Weather Forecast
Jefferson City, Illinois Weather
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Weather Forecast for Jefferson City, Illinois : Jefferson County
Issued: 10:56 am CST Dec 7, 2025 Latitude: 38.3786607 Longitude: -89.0434021 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Monday Tuesday Wednesday Thursday Friday Saturday
10% chance of on This Afternoon Mostly Cloudy on Tonight Mostly Sunny on Monday Mostly Sunny on Tuesday Partly Sunny on Wednesday 20% chance of rain & snow on Thursday Mostly Sunny on Friday Partly Sunny on Saturday
High: 43°F Low: 23°F High: 36°F High: 49°F High: 50°F High: 38°F High: 27°F High: 22°F
Low: 24°F Low: 41°F Low: 28°F Low: 18°F Low: 7 °F  
Increasing Clouds Mostly Cloudy Mostly Sunny Mostly Sunny Partly Sunny Rain & Snow Mostly Sunny Partly Sunny
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Current Conditions at
CENTRALIA MUNICIPAL ARPT - (KENL)
Cloudy
as of 11:35 AM CST
Wind Data
Calm
Current Conditions at
MT VERNON - (KMVN)
Cloudy
as of 11:39 AM CST
Visibility: 8 Miles
Pressure: 30.03 in.
Flight Rule: MVFR
Wind Data
6 MPH
Cloud Level(s): Solid Overcast at 1600ft
Current Conditions at
SALEM-LECKRONE ARPT - (KSLO)
43°
Feels like 36°F
Cloudy
Haze
as of 11:35 AM CST
Rel. Humidity: 81%
Dew Point: 37°F
Visibility: 5 Miles
Pressure: 30.03 in.
Flight Rule: MVFR
Wind Data
10 MPH
320° Northwest
Cloud Level(s): Solid Overcast at 1100ft
Current Conditions at
FLORA MUNICIPAL AIRPORT - (KFOA)
43°
Feels like 37°F
Mostly Cloudy
Haze
as of 11:35 AM CST
Rel. Humidity: 81%
Dew Point: 37°F
Visibility: 7 Miles
Pressure: 30.04 in.
Flight Rule: MVFR
Wind Data
9 MPH
330° Northwest
Cloud Level(s): Broken at 1300ft, Broken at 2600ft
10% chance of This Afternoon This Afternoon... A slight chance of drizzle before 5pm. Increasing clouds, with a high near 43. North wind 6 to 11 mph.
Mostly Cloudy on Tonight Tonight... Mostly cloudy, with a low around 23. North wind 7 to 10 mph, with gusts as high as 18 mph.
Mostly Sunny on Monday Monday... Mostly sunny, with a high near 36. North wind around 6 mph becoming calm in the afternoon.
Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 24. Light south wind becoming south southwest 8 to 13 mph after midnight. Winds could gust as high as 21 mph.
Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 49. South southwest wind 13 to 15 mph, with gusts as high as 23 mph.
Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 41. South southwest wind 14 to 18 mph, with gusts as high as 28 mph.
Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 50. West southwest wind 9 to 17 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph.
20% chance of rain & snow Wednesday Night Wednesday Night... A slight chance of rain before midnight, then a chance of rain and snow. Mostly cloudy, with a low around 28. Northwest wind 5 to 7 mph becoming light and variable.
20% chance of rain & snow Thursday Thursday... A chance of rain and snow. Mostly cloudy, with a high near 38. East wind 6 to 8 mph becoming north in the afternoon.
10% chance of rain & snow Thursday Night Thursday Night... A slight chance of rain and snow before midnight. Mostly cloudy, with a low around 18. North northwest wind 6 to 10 mph.
Mostly Sunny on Friday Friday... Mostly sunny, with a high near 27. Northwest wind 10 to 13 mph, with gusts as high as 20 mph.
Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 7. Northwest wind around 10 mph.
Partly Sunny on Saturday Saturday... Partly sunny, with a high near 22. West northwest wind 7 to 10 mph.
Current Radar Image


Sun Almanac for Jefferson City, Illinois
Sunrise: 07:00 AM
Sunset: 4:35 PM
Civil Sunrise:06:31 AM
Civil Sunset: 5:05 PM
Nautical Sunrise: 05:58 AM
Nautical Sunset: 5:38 PM
Astro Sunrise: 05:26 AM
Astro Sunset: 6:10 PM
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